Extrusion



FIG. 1 is a front perspective view of an extrusion according to our design;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The extrusion is shown with a symbolic break in its length. The appearance of any portion of the extrusion between the break lines forms no part of the claimed design. 

CLAIM The ornamental design for an extrusion, as shown and described. 